"Nationality: British
based: Ealing, Greater London, England, United Kingdom
Traded at Orion Works, Ealing (1921-1948). Founded probably in the late 19th century, traded as W. Ottway & Company Ltd. until 1968 but was taken over by Hilger & Watts after 1948 but retained original trading name." - https://collection.sciencemuseumgroup.org.uk/people/cp61722/w-ottway-and-company-limited, 09.12.2020
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